JEE Main Chemistry question

Not in JEE Main or NEET syllabus

How many octahedral and tetrahedral holes are present per unit cell in a face-centred cubic arrangement of atoms?

(A)8, 4
(B)1, 2
(C)4, 8Correct
(D)2, 1

Answer: (C)

Solution

For an fcc unit cell with atoms, the number of octahedral voids equals the number of atoms, i.e. 4, and the number of tetrahedral voids is twice that, i.e. 8 — not 8 and 4

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Question ID VK-141742